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Scientific article
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English

A fast and versatile quantum key distribution system with hardware key distillation and wavelength multiplexing

Published inNew journal of physics, vol. 16, no. 1, 013047
Publication date2014
Abstract

We present a compactly integrated, 625 MHz clocked coherent one-way quantum key distribution system which continuously distributes secret keys over an optical fibre link. To support high secret key rates, we implemented a fast hardware key distillation engine which allows for key distillation rates up to 4 Mbps in real time. The system employs wavelength multiplexing in order to run over only a single optical fibre. Using fast gated InGaAs single photon detectors, we reliably distribute secret keys with a rate above 21 kbps over 25 km of optical fibre. We optimized the system considering a security analysis that respects finite-key-size effects, authentication costs and system errors for a security parameter of εQKD = 4 × 10−9.

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Citation (ISO format)
WALENTA, Nino et al. A fast and versatile quantum key distribution system with hardware key distillation and wavelength multiplexing. In: New journal of physics, 2014, vol. 16, n° 1, p. 013047. doi: 10.1088/1367-2630/16/1/013047
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ISSN of the journal1367-2630
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Creation05/12/2014 2:39:00 PM
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